CPT® Code 88271

The CPT® Code 88271 refers to a laboratory test that focuses on molecular cytogenetics, specifically utilizing DNA probes such as fluorescence in situ hybridization (FISH). This procedure is essential for analyzing the genetic material found in various biological samples, including bone marrow, whole blood, amniotic fluid, or chorionic villi. Molecular cytogenetics is a branch of genetics that studies the structure and function of chromosomes, including their abnormalities and variations. The insights gained from these studies are crucial for understanding various genetic conditions and diseases. The samples required for this test are typically obtained through specific procedures like venipuncture, bone marrow aspiration, amniocentesis, or chorionic villus sampling, which are separately reportable. The test is particularly valuable for rapid detection of aneuploidy in chromosomes X, Y, 13, 18, and 21, which can indicate certain genetic disorders. Additionally, it plays a significant role in the risk stratification of conditions such as multiple myeloma, the detection of genomic abnormalities in chronic lymphocytic leukemia, and the diagnosis of acute lymphocytic leukemia. Furthermore, it aids in distinguishing between aggressive lymphomas and monitoring minimal residual disease in patients with therapy-related myelodysplastic syndrome or acute myelogenous leukemia. The examination of whole blood can also help identify chromosome deletions or duplications in individuals with a family history of genetic defects, and it is instrumental in excluding specific genetic rearrangements in patients with various forms of leukemia.